Online appointment and billing system for education learning center by Lexis12

I want to create a web app that can be installed for external and internal usage (local server or web/app server on the internet). The main features are: – calendar for staff and customers – one class = 1 tutor and several students – color code so it’s easy to see the booked days… (Budget: $3000-$5000 USD, Jobs: HTML, MySQL, PHP, Software Architecture)